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1、VisualInspectionOutlineIntroductionBasicprinciplesManualVisionInspectionHumanVisionCommonInspectionapplicationsEquipmentAutomatedorMachineVisionInspectionMachineVisionCommonInspectionApplicationsEquipmentAdvantagesandLimitationsGlossaryoftermsIntroductionVisualinspection
2、iscommonlydefinedas“theexaminationofamaterial,component,orproductforconditionsofnonconformanceusinglightandtheeyes,aloneorinconjunctionwithvariousaids.Visualinspectionoftenalsoinvolves,shaking,listening,feeling,andsometimesevensmellingthecomponentbeinginspected.Visualins
3、pectionconsistsofatleasttwomajorprocesses.Thefirstisasearchprocess.Thesecondisaprocessofcombiningrelevantknowledge,sensoryinput,andpertinentlogicalprocessestoprovideanidentificationthatsomeanomalyorpatternrepresentsaflawthatposesarisktotheperformanceofthepart.Visualinspe
4、ctioniscommonlyemployedtosupportotherNDTmethods.Digitaldetectorsandcomputertechnologyhavemadeitpossibletoautomatesomevisualinspections.Thisisknownas“machinevisioninspection.”IntroductionVisualinspectionisthemostbasicandmostcommonlyemployedNDTmethod.Itisapplicabletoawidev
5、arietyofmaterialtypesandproductforms.Severalcharacteristicsaboutthepartbeingexaminedmaybedetermined,whichincludedimensionalconformance,thepresenceofdiscontinuities,generalfitandwear,andsimplecosmeticcompliance.Itcanbeperformedbydirectorindirectmethodsduringvariousstageso
6、fmanufacturingorafterthecomponenthasbeenplacedin-service.Thequalityofaninspectionareaffectedprimarilybyfourfactors.Thequalityofthedetector(eyeorcamera).Thelightingconditions.Thecapabilitytoprocessthevisualdata.Theleveloftrainingandattentiontodetail.IntroductionIntroducti
7、on– ManualVersusAutomatedInspectionThemajorityofvisual inspectionsarecompleted byaninspector,but machinevisionisbecoming morecommon.Theprimaryadvantageofan inspectoristheirabilitytoquicklyadapttoavarietyoflightingandothernon-typicalconditions,andtheirabilitytouseothersen
8、ses.Theprimaryadvantageofamachinevisioninspectionsystemistheirabilitytomakeveryconsistentandrapidinspec
